Mechanical breakpoint module and solid-state circuit breaker
By introducing locking components and energy storage components into the mechanical breakpoint module of the solid-state circuit breaker, the automatic disconnection function of the mechanical breakpoint module is realized, solving the problem that the mechanical breakpoint module does not have the free trip function in the prior art, and improving the safety and stability of the circuit.
Patent Information
- Application Number
- CN202311635887.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-01
- Publication Date
- 2025-06-03
AI Technical Summary
In existing solid-state circuit breakers, the mechanical breakpoint module does not have the free trip function, which causes it to be unable to automatically disconnect when the electronic breakpoint module fails, affecting the stability and safety of the circuit.
A mechanical breakpoint module with a locking assembly is designed, which includes a housing, a handle, a static contact, a moving contact, a transmission assembly, an energy storage component and a locking assembly. The locking component can be switched to the unlocking state through the unlocking signal sent by the controller, causing the energy storage component to drive the transmission component, and then disengage the moving contact from the static contact, thereby realizing the automatic disconnection of the mechanical breakpoint module.
It realizes that when an unexpected event such as an overload occurs in the circuit, the mechanical breakpoint module can be automatically disconnected, improving the safety and stability of the circuit without manual operation.
Smart Images
Figure CN120089570A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a mechanical breaking point module and a solid-state circuit breaker for a solid-state circuit breaker, and more particularly, to a mechanical breaking point module having a free tripping function and a solid-state circuit breaker including the mechanical breaking point module. Background Art
[0002] During the operation of a mechanical breaking point module for a solid-state circuit breaker, the movement of a handle drives the movement of a moving contact to control the contact or separation of the moving contact and a static contact (corresponding to the closing state and the opening state of the mechanical breaking point module respectively), thereby realizing the control of the closing and opening of a circuit. The solid-state circuit breaker includes a mechanically connected mechanical breaking point module and an electronic breaking point module, and the electronic breaking point module can be disconnected by a control signal sent by a controller. However, in the existing solid-state circuit breakers, the mechanical breaking point module does not have the function of free tripping. When the operating handle of the mechanical breaking point module is locked in the closing position, the controller can only control the disconnection of the electronic breaking point module and cannot control the disconnection of the mechanical breaking point module, and the mechanical breaking point module can only be manually disconnected. Thus, once a fault occurs in the electronic breaking point module, the solid-state circuit breaker cannot be automatically disconnected and can only manually disconnect the mechanical breaking point module. If an accident such as overload occurs in the circuit, it is difficult to automatically disconnect the solid-state circuit breaker, which has an adverse effect on the stability and safety of the circuit.
[0003] Therefore, it is desirable to propose a mechanical breaking point module for a solid-state circuit breaker and a solid-state circuit breaker including the mechanical breaking point module to improve the defects in the above-mentioned prior art. Summary of the Invention
[0004] According to a first aspect of the present invention, there is provided a mechanical breaking point module for a solid-state circuit breaker, the mechanical breaking point module including: a housing; a handle rotatably mounted to the housing between an opening position and a closing position; a static contact fixed to the housing; a moving contact rotatably movable to contact or separate from the static contact to cause the mechanical breaking point module to be in a closing state and an opening state respectively; a transmission assembly, the movement of the handle being transmitted to the moving contact via the transmission assembly; an energy storage member connected to the transmission assembly, the energy storage member being configured to drive the transmission assembly to move; a locking assembly capable of switching between a locked state and an unlocked state, when the locking assembly is in the locked state, the mechanical breaking point module cannot be switched from the closing state to the opening state, and when the locking assembly is in the unlocked state, the mechanical breaking point module can be switched from the closing state to the opening state; wherein the locking assembly can receive an unlocking signal sent by a controller to switch from the locked state to the unlocked state, so that the transmission assembly is driven by the energy storage member, and further drives the moving contact to separate from the static contact.
[0005] According to this solution, when the mechanical break point module is in the closing state, if an unexpected event such as an overload occurs in the circuit, the controller can send an unlocking signal to switch the locking component to the unlocked state, and then the energy released by the energy storage component is used to separate the moving contact from the static contact, so that the mechanical break point module is switched from the closing state to the opening state, disconnecting the circuit and playing a role in protecting the circuit. The above process does not require manual operation, improving the safety and stability of the circuit.
[0006] In some solutions, the transmission component includes a first connecting rod, a second connecting rod and a transmission part. The handle is connected to the first end of the first connecting rod via an energy storage component; the first end of the first connecting rod is rotatably connected to the first end of the second connecting rod, and the second end of the first connecting rod opposite to the first end is rotatably mounted on the housing; the second end of the second connecting rod opposite to the first end is rotatably connected to the transmission part; the transmission part is rotatably mounted on the housing, and the connection point of the transmission part and the second connecting rod is spaced apart from the mounting point of the transmission part and the housing; the transmission part is fixedly connected to the moving contact. When the locking component is in the locked state, the locking component can block the movement of the transmission part, thereby preventing the mechanical break point module from switching from the closing state to the opening state.
[0007] In some solutions, the transmission part may include a main body and a first protrusion, a second protrusion and a third protrusion protruding outward from the main body. The mounting point of the transmission part and the housing is located on the first protrusion, the second protrusion is fixedly connected to the moving contact, and the third protrusion is adjacent to the locking component.
[0008] In some solutions, the locking component may include a tripping lever having a protrusion and a latch having a locking hole. When the locking component is in the locked state, the protrusion is inserted into the locking hole, making the tripping lever fixed relative to the latch, so that the latch can block the movement of the transmission part, thereby preventing the mechanical break point module from switching from the closing state to the opening state.
[0009] In some solutions, the energy storage component may be a spring.
[0010] According to this solution, when the locking component is unlocked, the spring can release its stored elastic potential energy to drive the transmission component to move, thereby driving the moving contact to move in the direction of separating from the static contact. In this way, when the locking component is unlocked, the mechanical break point module can automatically disconnect under the action of the spring without manual operation, further increasing the reliability and safety of the circuit.
[0011] In some solutions, the handle may include a driving arm. When the locking component is in the locked state, when the handle is rotated to the opening position, the driving arm can contact the tripping lever and drive the tripping lever to rotate, moving the locking component to the unlocked state.
[0012] According to this solution, when the locking component is in the locked state, the mechanical break point module can also be disconnected only by operating the handle. Specifically, first, the locking component is unlocked by the driving arm on the handle, and then the spring force drives the transmission component to drive the moving contact to move so that the moving contact is separated from the static contact, thereby realizing the disconnection of the mechanical break point module.
[0013] In some solutions, the mechanical break point module may further include a button. One end of the button protrudes outside the housing, and the other end of the button is close to the opening lever. When the locking component is in the locked state, when the button is pressed, the button can contact the opening lever and drive the opening lever to rotate, causing the locking component to move to the unlocked state.
[0014] According to this solution, when the locking component is in the locked state, the mechanical break point module can be disconnected by pressing the button. Specifically, first, the locking component is unlocked by pressing the button, and then the spring force drives the transmission component to drive the moving contact to move so that the moving contact is separated from the static contact, thereby realizing the disconnection of the mechanical break point module.
[0015] In some solutions, the transmission part can be a beak head.
[0016] According to the second aspect of the present invention, a solid-state circuit breaker is provided, including the mechanical break point module according to the first aspect of the present invention.
[0017] According to this solution, when the mechanical break point module is in the closed state, if an unexpected event such as an overload occurs in the circuit, the locking component can be switched to the unlocked state and then the spring force is used to separate the moving contact from the static contact, so that the mechanical break point module is switched from the closed state to the open state, and the solid-state circuit breaker is switched to the off state, playing a role in protecting the circuit.
[0018] In some solutions, the solid-state circuit breaker may further include an electronic break point module, and the electronic break point module is connected in series with the mechanical break point module.
[0019] According to this solution, the disconnection of any one of the electronic break point module and the mechanical break point module can cause the solid-state circuit breaker to disconnect. When an unexpected event such as an overload occurs, even if one of the electronic break point module and the mechanical break point module fails to disconnect in time, the circuit can be cut off by relying on the disconnection of the other of the electronic break point module and the mechanical break point module, thereby protecting the circuit. In this way, the reliability and safety of the circuit are further improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 Shows a schematic diagram of a solid-state circuit breaker according to an embodiment of the present invention;
[0021] Figure 2Shows a schematic diagram of a mechanical break point module in the closed state according to an embodiment of the present invention;
[0022] Figure 3 Shows a schematic diagram of a mechanical break point module in the open state according to an embodiment of the present invention;
[0023] Figure 4 Shows a schematic diagram of a mechanical break point module in an intermediate state according to an embodiment of the present invention.
[0024] Reference numerals: 10 solid-state circuit breaker, 100 mechanical break point module, 110 housing, 120 stationary contact, 130 moving contact, 140 handle, 142 driving arm, 150 transmission assembly, 152 first rod, 154 second rod, 156 transmission member, 156-1 first protrusion, 156-2 second protrusion, 156-3 third protrusion, 160 locking assembly, 162 opening rod, 164 protrusion, 166 lock, 170 spring, 180 controller, 200 electronic break point module. Detailed implementation manners
[0025] In order to make the objectives, solutions and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the ordinary meanings in the art. The same reference numerals in the drawings represent the same components.
[0026] As Figure 1As shown, the mechanical breaking point module 100 of the present invention is used for the solid-state circuit breaker 10. The solid-state circuit breaker 10 further includes an electronic breaking point module 200 and a controller 180. The mechanical breaking point module 100 is connected in series with the electronic breaking point module 200, and the controller 180 is communicatively coupled to the electronic breaking point module 200. In the prior art, when an accidental event occurs in the circuit and needs to be disconnected to protect the circuit, the controller 180 sends signals to the electronic breaking point module 200 and the mechanical breaking point module 100, so that the electronic breaking point module 200 and the mechanical breaking point module 100 are disconnected, thereby causing the solid-state circuit breaker 10 to be disconnected. Since the mechanical breaking point module 100 does not have a free tripping function, when the operating handle of the mechanical breaking point module 100 is locked, the mechanical breaking point module 100 cannot be automatically disconnected. When the electronic breaking point module 200 fails and cannot be disconnected in time, only by manually operating the mechanical breaking point module 100 can the mechanical breaking point module 100 be disconnected, thereby causing the solid-state circuit breaker 10 to be disconnected. However, when the electronic breaking point module 200 fails and cannot be disconnected in time, if the mechanical breaking point module 100 cannot be manually operated in time, it may cause the solid-state circuit breaker 10 to fail to be disconnected in time to protect the circuit. Therefore, in the embodiment of the present invention, the controller 180 is communicatively coupled to the electronic breaking point module 200 and the mechanical breaking point module 100. The mechanical breaking point module has a free tripping function. The controller 180 can send a signal to the mechanical breaking point module 100 to cause the mechanical breaking point module 100 to be automatically disconnected, thereby causing the solid-state circuit breaker 10 to be disconnected. The above functions will be described in detail below.
[0027] Figure 2 and Figure 3Schematic diagrams of the mechanical break point module 100 in the closed state and the open state according to embodiments of the present invention are respectively shown. The mechanical break point module 100 mainly includes a housing 110, a stationary contact 120 fixed to the housing 110, a moving contact 130 capable of moving relative to the stationary contact 110, a handle 140, a transmission assembly 150, an energy storage component 170 connected to the transmission assembly 150 and configured to drive the transmission assembly 150 to move, and a locking assembly 160. Among them, the transmission assembly 150 can transmit the movement of the handle 140 to the moving contact 130, so that the handle 140 can be manually operated to move the moving contact 130. When the moving contact 130 contacts the stationary contact 120, the mechanical break point module 100 is in the closed state. When the moving contact 130 is separated from the stationary contact 120, the mechanical break point module 100 is in the open state. The locking assembly 160 can control the degree of freedom of the transmission assembly 150. When the locking assembly 160 is in the locked state, the degree of freedom of the transmission assembly 150 is frozen (i.e., the transmission assembly 150 cannot move), so that the moving contact 130 driven by the transmission assembly 150 cannot move in the direction of separating from the stationary contact 120, and the mechanical break point module 100 is maintained in the closed state. When the locking assembly 160 is in the unlocked state, the degree of freedom of the transmission assembly 150 is released (i.e., the transmission assembly 150 can move), so that the moving contact 130 driven by the transmission assembly 150 can move in the direction of separating from the stationary contact 120, and the mechanical break point module 100 can be switched from the closed state to the open state.
[0028] The controller 180 is communicatively coupled to the locking assembly 160 (e.g., by wired or wireless means (such as Wi-Fi, NFC, RFID, etc.)), and in the case where the locking assembly 160 is in the locked state, the controller 180 can send an unlocking signal to the locking assembly 160 to move the locking assembly 160 to the unlocked position. Thus, when the locking assembly 160 is in the locked state, the mechanical break point module 100 can be disconnected by the controller 180 sending a signal. Specifically, first, the locking assembly 160 is unlocked by the controller 180 sending a signal, and then the transmission assembly 150 is driven by the energy released by the energy storage component 170, and further drives the moving contact 130 to move to realize the separation of the moving contact 130 from the stationary contact 120, thereby realizing the disconnection of the mechanical break point module 100.
[0029] Preferably, the specific transmission mechanism of the transmission assembly 150 is described in detail below. The transmission assembly 150 includes a first connecting rod 152, a second connecting rod 154, and a transmission member 156. The handle 140 is connected to the first end of the first connecting rod 152 via a spring 170; the first end of the first connecting rod 152 is rotatably connected to the first end of the second connecting rod 154, and the second end of the first connecting rod 152 opposite to the first end is rotatably mounted to the housing 110; the second end of the second connecting rod 154 opposite to the first end is rotatably connected to the transmission member 156; the transmission member 156 is rotatably mounted to the housing 110, and the connection point of the transmission member 156 and the second connecting rod 154 is spaced apart from the mounting point of the transmission member 156 and the housing 110; the transmission member 156 is fixedly connected to the moving contact 130. In summary, the first connecting rod 152, the second connecting rod 154, and the transmission member 156 form a four-bar linkage mechanism. The rotation of the handle 140 causes the first connecting rod 152 to rotate through the spring 170. The first connecting rod 152 then drives the second connecting rod 154 to rotate, and the second connecting rod 154 then drives the transmission member 156 to rotate, thereby driving the moving contact 130 fixed to the transmission member 156 to rotate, completing the transmission process from the handle 140 to the moving contact 130.
[0030] When the locking assembly 160 is in the locked state, the locking assembly 160 can block the movement of the transmission member 156 in the transmission assembly 150, thereby preventing the movement of the entire transmission assembly 150, and further preventing the movement of the moving contact 130, and finally preventing the mechanical break point module 100 from switching from the closed state to the open state. When the locking assembly 160 is in the unlocked state, the degree of freedom of the transmission member 156 in the transmission assembly 150 is released (i.e., the transmission member 156 can move), enabling the entire transmission assembly 150 to move, and further enabling the moving contact 130 driven by the transmission assembly 150 to move in the direction of separating from the static contact 120, and finally enabling the mechanical break point module 100 to switch from the closed state to the open state. That is to say, regardless of whether the handle 140 is in the closed position or the open position, the state of the mechanical break point module 100 (closed state or open state) can be correspondingly controlled by controlling the state of the locking assembly 160 (locked state or unlocked state). In this way, even when the handle 140 is in the closed position, when a fault such as an overload occurs in the circuit, the mechanical break point module 100 can be disconnected by unlocking the locking assembly 160, thereby timely protecting the circuit from further damage.
[0031] Optionally, the transmission component 156 may include a main body and a first protrusion 156-1, a second protrusion 156-2, and a third protrusion 156-3 protruding outward from the main body. The installation point of the transmission component 156 on the housing 110 is located on the first protrusion 156-1. The second protrusion 156-2 is fixedly connected to the moving contact 130, and the third protrusion 156-3 is adjacent to the locking assembly 160. In this way, the first protrusion 156-1 of the transmission component 156 is used to rotatably fix to the housing 110, the second protrusion 156-2 of the transmission component 156 is used to convert the movement of the transmission component 156 into the movement of the moving contact 130, and the third protrusion 156-3 of the transmission component 156 is used to be associated with the locking assembly 160. Preferably, the transmission component 156 may be a bird's head.
[0032] Preferably, the locking assembly 160 may include a trip bar 162 having a protrusion 164 (e.g., a hook) and a latch 166 having a locking hole. When the locking assembly 160 is in the locked state, the protrusion 164 is inserted into the locking hole, so that the trip bar 162 is fixed relative to the latch 166, enabling the latch 166 to block the movement of the transmission component 156, thereby preventing the mechanical break point module 100 from switching from the closed state to the open state.
[0033] Optionally, the energy storage component 170 may be a spring. When the mechanical break point module 100 is in the closed state, the spring 170 is in the energy storage state. In this way, when the locking assembly 160 is unlocked, the spring 170 can release its stored elastic potential energy to drive the transmission assembly 160 to move, thereby driving the moving contact 130 to move in the direction of separating from the static contact 120. Therefore, when the locking assembly 160 is unlocked, the mechanical break point module 100 can automatically break under the action of the spring 170 without manual operation, further increasing the reliability and safety of the circuit.
[0034] Optionally, the handle 140 may include a driving arm 142. In the case where the locking assembly 160 is in the locked state, when the handle 140 is rotated to the open position (such as Figure 2 and 3 shown in the clockwise direction, it should be understood that the clockwise direction is only an example, and it can also be rotated in other directions according to specific situations), the driving arm 142 can contact the trip bar 162 and drive the trip bar 162 to rotate, causing the locking assembly 160 to move to the unlocked state. In this way, when the locking assembly 160 is in the locked state, the mechanical break point module 100 can also be disconnected only by operating the handle 140. Specifically, first, the locking assembly 160 is unlocked by the driving arm 142 on the handle 140, and then the transmission assembly 150 is driven by the elastic force of the spring 170, and further drives the moving contact 130 to move to realize the separation of the moving contact 130 from the static contact 120, thereby realizing the disconnection of the mechanical break point module 100.
[0035] Optionally, the mechanical break point module 100 may further include a button (not shown). One end of the button protrudes outside the housing 110, and the other end of the button is close to the opening lever 162. When the locking assembly 160 is in the locked state, when the button is pressed, the button can contact the opening lever 162 and drive the opening lever 162 to rotate, so that the locking assembly 160 moves to the unlocked state. In this way, when the locking assembly 160 is in the locked state, the mechanical break point module 100 can be disconnected by pressing the button. Specifically, first, the locking assembly 160 is unlocked by pressing the button, and then the transmission assembly 150 is driven by the elastic force of the spring 170, and then the moving contact 130 is driven to move so that the moving contact 130 is separated from the static contact 120, thereby realizing the disconnection of the mechanical break point module 100.
[0036] The above describes three methods for emergently disconnecting the mechanical break point module 100 in the event of an accidental event such as a circuit overload. These three methods all include two steps, that is, first unlocking the locking assembly 160, and then driving the moving contact 130 to separate from the static contact 120 through the transmission assembly 150 to realize the disconnection of the mechanical break point module 100. The second steps of the above three methods are basically the same, and the main difference lies in how to unlock the locking assembly 160 in the first step. Among them, the driving arm 142 and the button unlock the locking assembly 160 mechanically, while the controller 180 unlocks the locking assembly 160 electronically. Preferably, the mechanical break point module 100 may simultaneously include an independent driving arm 142, a button, and a controller 180. In this way, as long as one of the driving arm 142, the button, and the controller can work normally, the locking assembly 160 can be unlocked and then the mechanical break point module 100 can be disconnected. Therefore, a large safety margin can be obtained.
[0037] In this article, a plurality of exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments. However, those skilled in the art can understand that without departing from the concept of the present invention, various modifications and improvements can be made to the above specific embodiments, and various technical features and structures proposed by the present invention can also be combined without exceeding the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.
Claims
1. A mechanical breaking point module, which is used for a solid-state circuit breaker. Characterized in that: Comprising: A housing; A handle rotatably mounted to the housing between a tripping position and a closing position; A stationary contact fixed to the housing; A moving contact rotatably movable into and out of contact with the stationary contact to place the mechanical breaking point module in a closing state and a tripping state respectively; A transmission assembly, the movement of the handle being transmitted to the moving contact via the transmission assembly; An energy storage component connected to the transmission assembly, the energy storage component being configured to drive the transmission assembly to move; A locking assembly capable of switching between a locked state and an unlocked state. When the locking assembly is in the locked state, the mechanical breaking point module cannot be switched from the closing state to the tripping state. When the locking assembly is in the unlocked state, the mechanical breaking point module can be switched from the closing state to the tripping state; Wherein, the locking assembly can receive an unlocking signal sent by a controller to switch from the locked state to the unlocked state, so that the transmission assembly is driven by the energy storage component, and then drives the moving contact to disengage from the stationary contact.
2. The mechanical breaking point module according to claim 1, Characterized in that: The transmission assembly includes a first connecting rod, a second connecting rod and a transmission member. The handle is connected to the first end of the first connecting rod via the energy storage component; The first end of the first connecting rod is rotatably connected to the first end of the second connecting rod, and the second end of the first connecting rod opposite to the first end is rotatably mounted to the housing; The second end of the second connecting rod opposite to the first end is rotatably connected to the transmission member; The transmission member is rotatably mounted to the housing, and the connection point of the transmission member with the second connecting rod and the mounting point of the transmission member with the housing are spaced apart; The transmission member is fixedly connected to the moving contact. When the locking assembly is in the locked state, the locking assembly can block the movement of the transmission member, thereby preventing the mechanical breaking point module from being switched from the closing state to the tripping state.
3. The mechanical breaking point module according to claim 2, Characterized in that: The transmission member includes a main body and a first protrusion, a second protrusion and a third protrusion protruding outward from the main body. The mounting point of the transmission member with the housing is located on the first protrusion, the second protrusion is fixedly connected to the moving contact, and the third protrusion abuts against the locking assembly.
4. The mechanical breaking point module according to claim 2, Characterized in that: The locking assembly includes a tripping rod having a protrusion and a lock catch having a lock hole. When the locking assembly is in the locked state, the protrusion is inserted into the lock hole, so that the tripping rod is fixed relative to the lock catch, and the lock catch can block the movement of the transmission member, thereby preventing the mechanical breaking point module from being switched from the closing state to the tripping state.
5. The mechanical breaking point module according to claim 1, Characterized in that: The energy storage component is a spring.
6. The mechanical breaking point module according to claim 4, Characterized in that: The handle includes a driving arm. When the handle is rotated towards the opening position with the locking assembly in the locked state, the driving arm can contact the opening rod and drive the opening rod to rotate, causing the locking assembly to move to the unlocked state.
7. The mechanical breaking point module according to claim 4, wherein, it further includes a button. One end of the button protrudes outside the housing, and the other end of the button is close to the opening rod. When the button is pressed with the locking assembly in the locked state, the button can contact the opening rod and drive the opening rod to rotate, causing the locking assembly to move to the unlocked state.
8. The mechanical breaking point module according to claim 2, wherein, the transmission component is a beak head.
9. A solid-state circuit breaker, wherein, it includes the mechanical breaking point module according to any one of claims 1 to 8.
10. The solid-state circuit breaker according to claim 9, wherein, it further includes an electronic breaking point module, and the electronic breaking point module is connected in series with the mechanical breaking point module.